What is SSH

SSH (Secure Shell) is a network protocol that is used to securely connect to remote systems over an unsecured network, such as the internet. SSH provides a secure encrypted connection between a client and a server, allowing users to remotely access and control systems and services.

SSH works by creating a secure channel between the client and the server using encryption algorithms to secure the connection. This secure channel can be used to run various network services and applications, such as a command shell, file transfer protocol, or remote desktop application.

Find SSH Port

Nmap

nmap -sV -SC IP -p20,21

• Possible to find SSH on an other port

Attack

• Brute Force

hydra -t X -l USERNAME -P WORDLIST -vV IP ssh

Let's break it down:

• hydra      --->  Runs the hydra tool
• -t X         --->  Number of parallel connections per target
• -l ---> Points to the user who's account you're trying to compromise
• -P ---> Points to the file containing the list of possible passwords
• -vV          ---> Sets verbose mode to very verbose, shows login + password
• IP        ---> The IP address of the target machine
• ssh --->  Sets the protocol

Connection

Linux Connection

• Command

ssh USER@IP
ssh -i id_rsa USER@IP

• id_rsa ---> Private
• id_rsa.pub ---> Public (Contain Username)

Windows Connection

• Option

Remmina (tool)

Active Directory Connection

• Options

- Remmina (tool)

or

- ssh AD-DOMAIN\\<AD Username>@URL/IP/AD-ADDRESS        ---> From Linux terminal